Abrasive composition



Fatented June 30, 1925.

warren s'm'ras HENRY 3. POWER, OF NIAGARA FALLS, NEW YORK, ASSIGNOR TO THE CARIBORUNDUM saraN-T caries.

COMPANY, OF NIAGARA FALLS, NEW YORK, A CORPORATION OF PENNS YL- Serial No. 458,804.

via-Nu. ABRASIYE OOMPOSITION.

No Drawing. Application filed April 5, 1921.

To aZZ whom it may concern:

Be it known that I, HENRY R. liowna, a citizen of the United States, resldmg at Niagara Falls, in the county of N lagara and State of New York, have invented a new and useful Improvement in Abras ve Gompositions, of which the follow ng is a full, clear, and exact descnptlon.

The abrasive or grmdlng composltlon 1 herein referred to is for grinding metal surfaces, such as valve seats for motor englne's orfor any grinding operation where 1t is proposed to make a tight jomt between two metal surfaces.

I the abrasive particles. I also preferably add a hygroscopic or water retammgmaterial to prevent the grlndmg compositlon from drying out on exposure the am The jelly is made from certain elly forming algae such as 061178.111 seaweeds and lichens. These, when soaked in cold water, then boiled, filtered and slightly evaporated,

yield a jelly, which makes a satisfactory grinding composition when mixed with abrasive particles. There are very many algae that have this gelatinizing power and I use the ones commercially available. These are Oliondmcrisgms, a seaweed,

known commercially as Carrageen moss or Irish moss; also Gelideum corneum, a seaweed commercially called Chinese moss, Japanese isinglass, Japanese gelatine, vegetable isinglass or agar-agar, also Oeirwrz'a islamlica a lichen commonly called Iceland moss. 7 While I have used the botanical name to identify these jelly-forming algae, they may not, when commercially available,

be wholly isolated from other algae of simi-' 4 lar jelly-forming characteristics. I have included among the algae those plants called lichens because the lichens are characterized botanically as algae on which fungi are supported.

In the production of the abrasive composition herein referred to, I first soak the alga 1n cold water for a few hours, then boll until the whole of the jelly-forming part I use a gelatinous body or jelly to hold 4 of the alga has gone into solution or suspension. Then I filter to remove the non-jellyforming portion, and evaporate to produce the required jelly strength. The abrasive particles and glycerine are now stirred in and when the whole cools, a preservative added in the form of formaldehyde.

The proportions I find satisfactory are Parts. Water 44 Irish moss. 4 -Glycerine 2 Carborundum Formalin The function of the glycerine is to counteract the drying tendency of such a paste, when exposed to the air.

While I prefer to use gly'cerine, other hygroscopic or moisture-retaining bodies may be used. I may also use such hygroscopic .or moisture retaining bodies with abrasive compositions: having gelatinous bases made from materials such as glue, edible gelatine, starch, flour, etc.

While I have stated definite proportions v.

of the ingredients, I ma change these, depending on thenature o the jelly required, the size of the particles of abrasive orfor similar reasons. 4 Moreover, the abrasive may be other than carborundilm. If it is so desired, a filler to' give body to the jelly may be added in the nature of finely powdered limited to its specific embodiments above tially as described.

3. An abrasive composition comprising abraslve partlcles,

an algae jelly-product and ,80 soapstone. The present invention isnot- .described but may be otherwise embodied- I a v filler, said composition beingl substan- 5. An abrasive composition comprising a tially free from either alum or oil'substan- :jel lymade from Irish moss and water, 50 1 tially as described. 7 7 parts of carboi'undum, 2 parts of glycerine, 44 An abrasive composition comprising and part of formalin, substantially as 5 abrasive particles, a gelatinous mater al and described, t v

aymoisture-retaining. material, saidoompojsitestimony whereof, I have hereunto set tion being substantially free fromelther my hand. n alum or Oll substantially as described. HENRY R. POWER. 

